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How do I disable an individual sprinkler

I have a sprinkler system that works fine. Trouble is I have now installed an emergency power system and one of the sprinkler heads is located close to the power system. I would like to permanently disable that one sprinkler. I tried to purchase a simple cap for the pop-up tube, but could not find one.

(a) What is the best way to accomplish my objective?

(b) If the answer is replace the nozzle with a cap, where can I get one? I believe the pop-up is a Rain Bird, approximately 1/2 inch OD.

I have been to hardware stores, Home Depot and Lowes without finding the cap. I bought what I thought would do the job, a 1/2 pvc cap, but it was too large. I can find replacement sprinkler heads of various kinds, but nothing that will simply plug the riser and stop the flow of water.

1. Easy one that nobody mentioned: install a sprinkler head on top of the riser, and turn the adjustment screw fully clockwise. This effectively shuts the sprinkler head off. No cost involved.

2. Dig up the space around the riser and remove the riser. THEN the caps that responders were telling me to get will work. Those "caps" will not install on top of the riser. Not knowing what I was doing, I was asking for a cap that would accomplish method 1 above. Not available.

I ended up getting my installation contractor out to cure some other problems I was having, and he told me how to do the above. I did solution 1 and it did work, but since he was there anyway, he did the more professional job, solution 2, for me.[]

Full Rubber Washer

1. Easy one that nobody mentioned: install a sprinkler head on top of the riser, and turn the adjustment screw fully clockwise. This effectively shuts the sprinkler head off. No cost involved.

2. Dig up the space around the riser and remove the riser. THEN the caps that responders were telling me to get will work. Those "caps" will not install on top of the riser. Not knowing what I was doing, I was asking for a cap that would accomplish method 1 above. Not available.

I ended up getting my installation contractor out to cure some other problems I was having, and he told me how to do the above. I did solution 1 and it did work, but since he was there anyway, he did the more professional job, solution 2, for me.[]

Rubber Washer

Hey Guys, I just closed off 4 sprinkler heads in my beds where I really didn't need them to sprinkle.

It was a 1.2.3. project. Clear the dirt from around the TOP of the head, Grab the head and twist counter clock wise. You may be able to remove the entire sprinkler head this way. However, the top may separate from the body, if so, then use pliers to remove the body by way of the threaded edge, once that is done, unscrew and follow the directions below. ( I am planning a YouTube video of this method some time soon )

Remember: There should be NO digging with this method, just clearing the dirt away from the top.

1) Remove the head entirely

2) Place a full rubber washer in the threaded opening at the bottom sealing the water inlet
( I made my own from a thick card magnet, Measure then cut, making sure it was a very tight fit so as to not fall off when placing back to reconnect )

3) Screw it back on slowley & carefully so as to not get any dirt onto the threads.